Which best describes longitudinal waves?
A. Compressions and rarefactions make up longitudinal waves, which can only travel in matter.
B. Light energy travels in longitudinal waves and can travel in either matter or empty space.
C. Longitudinal waves carry sound energy and are made up of crests and troughs.
Out of the choices given, the best statement that describes a longitudinal wave is "compressions and rarefactions make up longitudinal waves, which can only travel in matter. " The correct answer is A.Â
